Antiglare device



Nov. 18, 1930, F. A. TREIBER 2,

ANTIGLARE DEVICE F'iled June 21, 1950 Y 2 Sheets-Sheet l Patented Nov.18, 1930 'ZlFRANK AQ TREIBERJO E cuMB nLAND, MARYLAfiD ANTIGLARE DEVICEApplication filed J'une 21, 1930ii'Seria1-No.462 ,900.

glare deviceparticularly adapted for use on automobiles. Automobileheadlights in use the present 5 time are not altogether satisfactorybecause, in orderto project suficient light to illumi nate the road therequired legal distance in advance of the automobile, they must projectraysfof such strength that they will be exto overcome thisdiflicultyythe generalprac- U66 is to prov de lenses or screenlng meansi of such conformation that the brighter rays of theheadlight will beprojected downwardlyupon the surface of the road, so that they a willnot shine directly into the eyes of pedes-v triansorapproachingdrivers." HOWQV61,tl1lS practice doesnot remedy thediificultyto any considerable extent, since -the headlights of cars meeting at thebrow of aj'hill shine {directlyintothe eyes ofthe respective drivers;and anyirregu-larity in the surfaceof theroad which throws theforwardend-of the car up wardly to any extent likewise causes theupwardly at an unsafe angle. y y

The principal object of the present inven tion is to provide a devicewhich may be at tach'edto automobile headlights or any-other 2 brighterrays of the headlight to be projected 1 30 light projector and whichwill soften "the rays projected from thelight without in any degreediminishing their illuminating qualities. a V

Another object of my invention is to pro- $3 vide @adeviceofthetype'indicatedwhich will impart an effect of lunar whiteness :tothe rays proj ected from the headlight and which will give perfectdiffusion of the projected A still further object of the inventlon s toprovide an 1 anti g-lare device which may i beappl-ied to any headlightbulb of the usual constructionand which maybe used with'or without anyofthe standard headlight lenses.

videa device of this type which may be very readily and economicallymanufactured and which maybesold at {a veryreasonable cost.

Other objects and advantagesof inven- Q tion lvvfi lllybe apparent i onthe following ispecification and anne-Xed drawings. drawing."

. Thepresent invention relatesto an anti 7 socket; 10 tremelybright andglaring. In an attempt tied form of a Another object of the invention isto pro- F1 gure the l a front View of my anti-glare device attached toanautomobile headlight;

Figure 2 is a vertical sectional viewtaken onthe line 2-2 of Figure 1;:a

Figurefiiis a perspective view of the de Figure 4 is a side elevation ofthe screen or shield used as part of my device; Q

Figure 5 is a rear view-of the screen shown in Figure 4;

vice showing attached on the headlight bulb 5 I Figureb showsa sideelevation of a modi screen or shield which may be used in my device; andV Figure 7 is a rear view ofthe screen shown in Figure 6. i

The nuineral l Oidesignates automobile I headlight provided withga lens11, reflector usual construction.

m 12, and bayonetslot bulb socket 13, all of the Referring to the" formof my invention shown in Figs. 1 to 5, inclusive, my anti-glare deviceisgenerally indicated by the numeral" and includes a screen orshieldmemb'er 16 which is 7 preferably cup shaped and formed of glass.The screen or shield mem- 7 ber 16 is fitted about the usual headlightbulb QI'Zand has'a relatively short collar portion which is positionedaboutandfextends along the base1'9 oi the headlight bulb. A washer 20:of it'eltor other resilient materialis preferably interposed between therear edge of the collarfll-hand the forward edgegof the bulb socket 13;aiid it willbe seenthatby this arrangement therscreeni lfi is clamped inpo bulb is attached to thesocket13. a

sition on the bulb when the t VA-n inwardly projecting ridge, orshoulder 18 is formedabout the;screen 16 closely adjacent its forwardedge 21Ifor a purpose hereinatter set forth, and "the form of screengillustrated in Figs. 1 to 5is frosted as at (see a 95 Figs. 3,: 4, and5)-'from its rear edge or cen-" tral portion to the innerinostedge 22ofthe:

inwardly projecting'shoulder 18. up i The numeral 23 designates a row ofre fractive elements strung upon a Wire and ,positioned about theoutsideofthe screen 16 1h the depression formed by the inwardly projectingshoulder 18. A second row of refractive elements 24 is positioned on theinside of the screen 16 behind the shoulder 18, the shoulder 18 and theconcave shape of the screen 16 forn'iiug a groove 4-0. The rows ofrefractive elements 23 and 24 may be colored, amber or green beingdesirable tints, or crystal elements may be used. It is also desirableto have a tint in the glass of the screen 16, pale rose being a verysatisfactory tint for this purpose.

lnstead of being perfectly round and smooth, it"is found preferable toform at least one surface of the central portion of die screen 16 ofextremely narrow fiattened portions radiating from the center of thescreen, the whole giving that surface of the screen the appearance ofbeing provided with radiating lines. This arrangement is bestillustrated in Figs. 4: and 5. in the use of my anti-glare device, therays of light which are projected to the rear by the bulb 17 will besoftened by passage through the frosted portion 30 of the screen lb. Thetint preferably incorporated in the screen will increase the softeningefiect, and the radiating flat portions of one surface of the screenwill tend to diffuse the rays. It is obvious that rays reflected backupon the frosted portion 30 of the screen 16 by the reflector 12 will befurther softened and diffused. Rays passing directly from the bulb tothe refractive elements 28 andQ l will be broken no b these elements andwill be arol Y 1 ected at various an ies some into the re flector 12 andsome to the outside of the projector 10. Some of the rays originallydirected from the bulb to the reflector will also pass into therefractive elements and will be broken up. The breaking up of these raysby the elements 23 and 24 results in eliminating the extremely brightrays and the softening and diffusing of the rays projected from theheadlight. Some of the rays will be projGC't-Bd outside of the area to wiich automobile headlight rays are generally projected, but none ofthese rays will be blinding, and because they will illuminate a widerarea than is generally the case, the automobile driver will beconsiderably a. sisted.

If either or both the screen 16 and the refractive elements, or acertain number of the latter elements are tinted in the mannersuggested, the beam projected will have an effect of lunar whitenessbecause of the slightly tinted rays which will be scattered throughoutthe entire beam.

It is customary to form headlight bulbs so that a minimum number of rayswill be projected forwardly from the bulb, and I find in actual practicethat the few light rays which are projected directly forward from thebulb are not sufficient in number or sufficiently bright to annoy orblind approaching drivers.

The shield 15 illustrated in Figs. 6 and 7, is identical with that usedin the device of 'vs. 1 to 5, inclusive, except thatthe shield 15 istranslucent or frosted at its outer or forward edge 31, the centralportion 32 of shield 15 preferably being clear. The screen 15 will befitted with refractive elements in the same manner as the shield 16. Thelight beam projected from the Fig. 6 device is slightly brighter at itscentral portion than that resulting from the use of the shield 16.However, the beam cast from the shield 15 is not so bright as to beblinding, this elfect effect being partially due to the diffusionbrought about by the radially arranged fialtoned surfaces 25.

The shield or screen used in my device may be of varying sizes,according to the size of the lens or bulb with which it is used. Thescreen may be colorless or tinted as desired, light rose, light green,or crystal giving the best results. The refractive elements may also beof varying sizes to accompany the different sizes of bulbs and/or lenseswith which the device may be used.

I claim:

1. The combination with a light projector including a source of light,of a partially translucent shield fitted about said source and having anannular shoulder about its forward portion and an annular refractivedevice surrounding said shoulder.

2. The combination with a light projector including a source of light,of a cup-shaped shield fitted about said source, said shield having agroove about its forward portion and refractive elements supportedwithin and behind the groove about said shield.

3. The combination with a light projector including a source of lightand a reflector, of shield between the light source and the reflector,said shield having a shoulder about its forward portion, a refractivedevice mounted to surround said shoulder, and said shield having a lightmodifying band therw about, the band and device being so arranged thatlight rays passing from the light source to the reflector will bemodified by said band or said device.

4. The combination with a light projector inchiding a source of lightand a reflector, of a shield between the light source and the reflector,said shield having a plurality of grooves about its forward portion andrefractive elements fitted in the grooves on the interior and exteriorof said shield.

5. An. anti-glare device comprising a cupshaped member having shouldersabout its forward portion, a strand of refractive beads mounted betweenthe shoulders and a light modifying band about said member to the rearof said shoulders.

FRANK A. TREIBER.

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